Dow Chem firings were for spreading porn by Company Email.

A two-month investigation by Dow Chemical, sparked by complaints from
an employee, resulted in the firings of about 50 workers for sending
explicit pornographic images through the company's e-mail system.
Another 200 workers also were disciplined by the chemical manufacturer
for distributing, downloading or saving pictures that were either
pornographic or violent in nature
http://www.nwfusion.com/news/2000/0728dowfires.html